Fabrication of Mg65Zn30Ca5 amorphous coating by laser remelting

Size constrains of traditional rapid solidification processes for fabrication of Mg-Zn-Ca bulk metallic glasses have limited their biomedical applications as implants. In this work, large-sized Mg65Zn30Ca5 amorphous coating was fabricated by laser remelting. The microstructure characterization and phase analysis indicated that the laser remelted coating was mainly composed of amorphous with a small amount of metastable crystalline Mg51Zn20. The thermal stability and crystallization behavior of the produced Mg65Zn30Ca5 coating were invested by differential scanning calorimetry. Results of potentiodynamic polarization test showed that the amorphous coating exhibited excellent corrosion resistance properties, which in close proximity to the Mg65Zn30Ca5 glassy ribbon. All these results suggested that the Mg65Zn30Ca5 amorphous coating could expand the potential application of Mg-Zn-Ca metallic glasses in the field of biomedicine.